Abstract : This report summarizes all work performed for the Energy Engineering Analysis Program (EEAP) Energy Savings Opportunity Survey (ESOS) at Fort Huachuca, Arizona, authorized under Contract DACA05-92-C-0155 with the U.S. Army Corps of Engineers, Sacramento District, Sacramento, California. The purpose of this study is to develop projects and actions that will reduce facilities energy consumption and operating costs at Fort Huachuca. Implementation of these projects will contribute to achieving the goal of the Army Facilities Energy Plan of a reduction in energy consumption per square foot of building floor area of 20 percent by FY2000 from FY1985 baseline levels. The facility survey and evaluation effort was limited to 21 buildings and a specific set of energy conservation opportunities (ECOs) having a high likelihood of proving to be economically feasible. Also included were feasibility evaluations of cogeneration alternatives including (a) cogenerating alternatives serving the existing central heating/cooling plants, (b) a generating facility sized to serve the total electric power requirements of Fort Huachuca and (c) a generating facility sized to serve the total power requirements of both Fort Huachuca and the adjacent city of Sierra Vista. Both turbine generators and reciprocating- engine generators were evaluated for a cogeneration facility serving the two central heating/cooling plants. Harmonic distortion sampling at four buildings containing significant computer loads or electronic fluorescent ballasts was also included in the study scope.